大型バルクキャリアの横強度の水試時実船試験

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This paper presents the results of experimental test on the transverse strength of 120,000 DWT class bulk carrier built by MHI in September 1970. The test was carried out under light loaded afloat condition by filling sea water into the cargo hold/water ballast tank, and the measurements were made on the stresses of double bottom structure, hopper tank, topside tank and side frames as well as the deformation of the hold. On the other hand, theoretical analysis was made by using a 3-dimensional frame structure model. Furthermore, in order to examine more accurately the stress distribution of the members in hopper tank and topside tank, calculation was carried out by finite element method. The general conclusions obtained from this investigation are as follows : (1) In general, theoretical predictions show a fairly good agreement with the experimental results. Accordingly, it is concluded that the reasonable estimation on the transverse strength of bulk carriers can be made by this analytical method of 3-dimensional frame structure model. (2) Comparatively high stress consentrations were observed at the ends or longitudinal girders and floors. (3) Hopper tank is very effective for the strength of double bottom structure in this test condition. Boundary condition of the double bottom seems near to fixed one. (4) Almost of the shear force in floor plate flows into the sloping transverse member of hoppertank. (5) The degree of the end fixity of the hold frames connected to balancing brackets is about seventy-five percent of those connected to transverse rings.
社団法人日本船舶海洋工学会の論文

大型バルクキャリアの横強度の水試時実船試験

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